<?php

class PostController extends Controller
{
	/**
	 * @var string the default layout for the views. Defaults to '//layouts/column2', meaning
	 * using two-column layout. See 'protected/views/layouts/column2.php'.
	 */
	// public $layout='//layouts/column1';

	/**
	 * Specifies the access control rules.
	 * This method is used by the 'accessControl' filter.
	 * @return array access control rules
	 */
	public function accessRules()
	{
		$accessRules = array(
			array('allow',  // allow all users to perform 'index' and 'view' actions
				'actions'=>array('view', 'index'),
				'users'=>array('*'),
			),
			array('allow', // allow authenticated user to perform 'create' and 'update' actions
				'actions'=>array('create','update'),
				'users'=>array('@'),
			),
		);
		$admin = User::model()->getAdminInfo();
		$superadmin = User::model()->getSuperAdminInfo();
		foreach ($admin as $value) {
			$accessRules[] = array('allow', // allow admin user to perform 'admin','create','update','delete' actions
				'actions'=>array('index','create','update','delete'),
				'users'=>array($value->username));
		}
		foreach ($superadmin as $value) {
			$accessRules[] = array('allow', // allow superadmin user to perform 'admin','create','update','delete' actions
				'actions'=>array('index','view','admin','create','update','delete'),
				'users'=>array($value->username));
		}
		//Quan trọng phần deny này phải ở cuối cùng của arrary acccessRules
		$accessRules[] = array('deny',  // deny all users
					'users'=>array('*'),
				);
		return $accessRules;
	}

	/**
	 * Displays a particular model.
	 * @param integer $id the ID of the model to be displayed
	 */
	public function actionView($id)
	{
		$author = User::model()->find(array(
		    'select'=>'username',
		    'condition'=>'id='.$this->loadModel($id)->post_author)
		);

		$group_post = GroupPost::model()->find(array(
		    'select'=>'group_name',
		    'condition'=>'id='.$this->loadModel($id)->group_id)
		);

		$sql = "SELECT id, post_title FROM post WHERE post.group_id = ". $this->loadModel($id)->group_id .' and post.id <> '.$id;
		$related_posts = Yii::app()->db->createCommand($sql)->queryAll();

		$this->render('view',array(
			'model'=>$this->loadModel($id), 'author'=>$author->username, 'group_name' => $group_post->group_name, 'related_posts' => $related_posts
		));
	}

	/**
	 * Creates a new model.
	 * If creation is successful, the browser will be redirected to the 'view' page.
	 */
	public function actionCreate()
	{
		$model=new Post;
		$litsGroupPost = GroupPost::model()->getArraryIdGroupName();
		if (count($litsGroupPost) > 0) {
			if(isset($_POST['Post']))
			{
				$model->attributes=$_POST['Post'];
				$image=CUploadedFile::getInstance($model,'image_link');
				$user_id = User::model()->find(array(
											'select'=>'id',
											'condition'=>"username='".Yii::app()->user->getId()."'",
										));
				$model->post_author = $user_id->id;
				if ($image) {
					$image_link = str_shuffle(md5($image)).".".$image->extensionName;
					$model->image_link = $image_link;
				} else {
					$model->image_link = "default.jpg";
				}

				if($model->save()) {
					$image->saveAs(Yii::app()->basePath."/../images/posts/".$image_link);
					$this->redirect(array('view','id'=>$model->id));
				}
			}

			$this->render('create',array(
				'model'=>$model,'litsGroupPost'=>$litsGroupPost,
			));
		} else {
			$this->redirect(array('GroupPost/create'));
		}
		
	}

	/**
	 * Updates a particular model.
	 * If update is successful, the browser will be redirected to the 'view' page.
	 * @param integer $id the ID of the model to be updated
	 */
	public function actionUpdate($id)
	{
		$model=$this->loadModel($id);
		$litsGroupPost = GroupPost::model()->getArraryIdGroupName();

		// Uncomment the following line if AJAX validation is needed
		// $this->performAjaxValidation($model);

		if(isset($_POST['Post']))
		{
			$model->attributes=$_POST['Post'];
			$image=CUploadedFile::getInstance($model,'image_link');
			if ($image) {
				$image_link = str_shuffle(md5($image)).".".$image->extensionName;
				$model->image_link = $image_link;
			}
			if($model->save()) {
				if ($image) {
					$image->saveAs(Yii::app()->basePath."/../images/posts/".$image_link);
				}
				$this->redirect(array('view','id'=>$model->id));
			}
		}

		$this->render('update',array(
			'model'=>$model,'litsGroupPost'=>$litsGroupPost,
		));
	}

	/**
	 * Deletes a particular model.
	 * If deletion is successful, the browser will be redirected to the 'admin' page.
	 * @param integer $id the ID of the model to be deleted
	 */
	public function actionDelete($id)
	{
		$this->loadModel($id)->delete();

		// if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
		if(!isset($_GET['ajax']))
			$this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin'));
	}

	/**
	 * Lists all models.
	 */
	public function actionIndex()
	{
		if(Yii::app()->user->isGuest) {
		 	$this->layout='//layouts/column1';
		}
		$item_count = Post::model()->count();
	    $page_size =10;
	    if ($item_count <= $page_size) {
	    	$page_size = $item_count;
	    }
	    $pages =new CPagination($item_count);
		$offset = $pages->getCurrentPage() * $page_size;
		$post_data = Post::model()->getPostShowPostIndex($page_size, $offset);
	    $pages->setPageSize($page_size);

	    $this->render('index', array(
	        'post_data' => $post_data,
	        'pages'=>$pages,
        ));

	}

	/**
	 * Manages all models.
	 */
	public function actionAdmin()
	{
		$model=new Post('search');
		$model->unsetAttributes();  // clear any default values
		if(isset($_GET['Post']))
			$model->attributes=$_GET['Post'];

		$this->render('admin',array(
			'model'=>$model,
		));
	}

	/**
	 * Returns the data model based on the primary key given in the GET variable.
	 * If the data model is not found, an HTTP exception will be raised.
	 * @param integer $id the ID of the model to be loaded
	 * @return Post the loaded model
	 * @throws CHttpException
	 */
	public function loadModel($id)
	{
		$model=Post::model()->findByPk($id);
		if($model===null)
			throw new CHttpException(404,'The requested page does not exist.');
		return $model;
	}

	/**
	 * Performs the AJAX validation.
	 * @param Post $model the model to be validated
	 */
	protected function performAjaxValidation($model)
	{
		if(isset($_POST['ajax']) && $_POST['ajax']==='post-form')
		{
			echo CActiveForm::validate($model);
			Yii::app()->end();
		}
	}
}
